CN110080904A - Cold energy gradient utilization system based on thermo-acoustic technology - Google Patents
Cold energy gradient utilization system based on thermo-acoustic technology Download PDFInfo
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- CN110080904A CN110080904A CN201910315264.9A CN201910315264A CN110080904A CN 110080904 A CN110080904 A CN 110080904A CN 201910315264 A CN201910315264 A CN 201910315264A CN 110080904 A CN110080904 A CN 110080904A
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- 238000005516 engineering process Methods 0.000 title claims abstract description 27
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- 238000003860 storage Methods 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 201000009240 nasopharyngitis Diseases 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000005138 cryopreservation Methods 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 239000002440 industrial waste Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 18
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 42
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/053—Component parts or details
- F02G1/057—Regenerators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G2243/00—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes
- F02G2243/30—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes having their pistons and displacers each in separate cylinders
- F02G2243/50—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes having their pistons and displacers each in separate cylinders having resonance tubes
- F02G2243/54—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes having their pistons and displacers each in separate cylinders having resonance tubes thermo-acoustic
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- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The cold energy gradient utilization system based on thermo-acoustic technology that the present invention relates to a kind of, including thermoacoustic power generation sub-system, combustion powered subsystem, throttling expansion subsystem, end cold energy recycle subsystem, indoor temperature end cycle subsystem.The thermoacoustic power generation sub-system includes front and back at least three-level thermoacoustic engine and its load straight-line electric unit；Combustion powered subsystem includes combustion-powered apparatus and exhaust equipment；Throttling expansion subsystem includes multi-level throttle expansion device；Cold energy recycling subsystem in end includes one or more levels end cold energy recycling heat exchanger；Indoor temperature end cycle subsystem includes indoor temperature end media heat exchanger and indoor temperature end medium circulation pump；By piping connection between each subsystem, using thermoacoustic engine as core energy converter, the efficient cascade utilization of cold energy is realized in conjunction with other power cycles and cold energy recovery method, there is the advantages that compact-sized, high efficient and reliable, at low cost.
Description
Technical field
The present invention relates to cold energy recycling fields, and in particular to a kind of cold energy gradient utilization system based on thermo-acoustic technology.
Background technique
In recent years, usage amount of the cryogen based on liquefied natural gas in China is significantly promoted, and is widely applied
In fields such as chemical industry, power generation, medical treatment, communications and transportation, heating.In at the international level, production capacity of the liquefied natural gas in various countries is quick
It is promoted, it is estimated that, it will jump to the year two thousand thirty natural gas dosage to non-renewable energy second.2017, China's liquified natural gas import
Up to 38,000,000 tons, and still keep ascendant trend.According to national energy strategical planning, the year two thousand twenty is arrived, natural gas is primary in China
Accounting in the energy will increase to 10% or more.In current natural gas transaction, the nearly one third for total amount of trading is with the day that liquefies
The form of right gas is transported, this portion of natural gas, which need to could be put into local liquefied natural gas vaporization station by re-vaporization, to be made
With or be delivered to user terminal.In this process, liquefied natural gas will discharge the cooling capacity of about 830-860kJ/kg.In tradition liquefaction day
In right gas Vaporizing Station, this part cooling capacity is usually taken away by seawater, and significant wastage is caused.
The Land use systems of cold energy of liquefied natural gas mainly include that cold energy generation, air separation, freezer, air-conditioning and low temperature are supported
It grows, cultivate.In many cold energy of liquefied natural gas recycling forms, cold energy generation is most to be hopeful to realize that large-scale engineering is answered
Cold energy way of recycling.Cold energy generation technology can be divided into two major classes according to its principle difference, first is that being used for improving existing
Power circulation system is improved efficiency to increase generated energy, and another kind of is using relatively independent cryogenic power generation cycle.Earliest is cold
Can generation mode specifically include that direct expansion method, the secondary refrigerant method of low temperature Rankine cycle, gas turbine cycle and all kinds of
Close electricity-generating method.
Partial monopoly, which is used, combines liquefied natural gas re-vaporization process with the gas-fired station on receiving station periphery, recycling combustion
Gas-turbine reduces the suction temperature of gas turbine cycle using cold energy while being vented middle-low grade thermal energy, improve gas turbine effect
The method of rate.It is worth noting that, directly extracting side of the Low Temperature Steam as heat source in such as ZL201010123728.5 patent
Method can effectively recycle cold energy, but cause influence to former gas turbine cycle efficiency.The air-breathing cooling of gas turbine cycle can
It is lower to cold source quality requirements using the following warm area cold energy of 110-260K.Such as United States Patent (USP) US6367258B1, by 110K
The method for the inlet gas cooling that the cold energy of left and right is directly used in gas turbine cycle be easy to cause cooling capacitySignificant wastage.
Farther out, pipe network discharge pressure is higher for the natural gas transportation distance in China.Chinese patent 200710027943.3 is in
In the patents such as state patent ZL201010123728.5, using direct expansion method as main cold energy way of recycling, it is utilized simultaneously
Cooling capacity in liquefied natural gasAnd pressure, but the natural gas handled through direct expansion method does not have and is directly entered high-voltage tube
The condition of net does not meet the application background of the natural gas receiving station in China at this stage.
Using Rankine cycle and its combined cycle as the cold energy recovery system of core at the international level in be widely used.It is Chinese special
Benefit 201810693128.9 describes a kind of cold energy generation system applied to large-scale liquefied natural gas receiving station, is in the nature mixed
The Rankine cycle of working medium low temperature is closed, different cold junction temperature operating conditions are coped with by monitoring and adjusting the ingredient of mixed working fluid in real time.In
State's patent 201710235556 describes a kind of cold energy generation based on Rankine cycle and remaining cooling capacity output system, uses three
The different Rankine cycle of grade, novelty are embodied in the use of multicomponent mixture work medium in different circulations.Based on Rankine cycle
In step cold energy way of recycling, to make full use of each warm area cold energy, harsh requirement is proposed to the selection and control of working medium,
And it is often difficult to evade the use of flammable working medium.This way of recycling process is complicated, and initial stage investment is big, investment cycle mistake
It is long, it is not suitable for middle-size and small-size liquefied natural gas receiving station.
Thermo-acoustic technology has just had received widespread attention because of its high intrinsic efficiency with high reliability since appearance.Thermoacoustic engine
The power cycle that air mass infinitesimal is maintained by establishing sound field in loop, eliminates the mechanical moving element of high and low temperature.At present
Widely applied thermo-acoustic engine system is by cool end heat exchanger, heater, regenerator, thermal buffer tube, indoor temperature end media heat exchanger
It is collectively formed with components such as resonatrons.Thermoacoustic engine is hot and cold by consumingTemperature gradient generation sound is established in regenerator
Function, and exported in the form of pressure oscillation to engine loading.Compared with other power circulation systems, thermo-acoustic engine possesses simpler
Single structure, lower manufacturing cost and higher stability.Current thermoacoustic engine device is usually by according to natural in liquefaction
It is gas-cooled in the cascade utilization of energy, the joint cold energy use method that thermoacoustic equipment is combined with other power cycles can sufficiently be sent out
It waves the advantage of different dynamic circulation and evades its defect, gathered around and had broad application prospects using field in cold energy of liquefied natural gas.
Summary of the invention
This patent provides a kind of cold energy gradient utilization system based on thermo-acoustic technology, using thermoacoustic engine as core transducing
Device realizes the efficient cascade utilization of cold energy in conjunction with other power cycles and cold energy recovery method.Its system is safe and reliable, conversion effect
Rate is high, and variable working condition adaptability is good and compact-sized, and initial cost and maintenance cost are lower.
Cold energy gradient utilization system provided by the invention based on thermo-acoustic technology, including thermoacoustic power generation sub-system, throttling it is swollen
Swollen subsystem, combustion powered subsystem, end cold energy recycling subsystem and indoor temperature end cycle subsystem；
The thermoacoustic power generation sub-system includes: the thermoacoustic engine of at least three-level, chopped-off head, secondary, final stage thermoacoustic engine
With linear generating unit；
The throttling expansion subsystem includes: the throttling set of at least two-stage, chopped-off head, secondary nuclear one-stage throttling device；
The combustion powered subsystem includes: combustion powered circulator, exhaust equipment；
The indoor temperature end cycle subsystem includes: indoor temperature end medium circulation pump, indoor temperature end media heat exchanger；
The end cold energy recycling subsystem includes: the end cold energy recycling heat exchanger of at least one level.
The low-temperature liquid storage tank is connected by cryogenic pump with thermoacoustic engines at different levels；
The thermoacoustic engines at different levels are sequentially connected, and chopped-off head throttling dress is connected between secondary, final stage thermoacoustic engine
It sets；Time nuclear one-stage throttling device is connected between final stage thermoacoustic engine and chopped-off head cold energy recycling heat exchanger；Thermoacoustic engines at different levels connect
It is connected to linear generating unit；Secondary nuclear one-stage throttling device is sequentially connected with combustion-powered apparatus, indoor temperature end media heat exchanger, and indoor temperature end is situated between
Matter circulating pump is connected in the both ends of indoor temperature end media heat exchanger, and is connected with combustion chamber and then connect thermoacoustic engines at different levels；
It is connected with chopped-off head cold energy recycling heat exchanger, secondary between the secondary nuclear one-stage throttling device and combustion-powered apparatus in turn
End cold energy recycles heat exchanger.
Thermoacoustic engine is three or more in this patent, and patent is described during describing with three；Its dress that throttles
It is also corresponding multiple for setting according to the figure in embodiment, is successively described by chopped-off head, secondary ....
Preferably, thermoacoustic engine at different levels described in the thermoacoustic power generation sub-system is standing wave, traveling wave or Standing-Traveling Wave
Mixed type thermoacoustic engine, the thermoacoustic engine are single-stage or multistage loop type thermoacoustic engine.
Preferably, the combustion powered circulator in the combustion powered subsystem is gas turbine cycle, steam moves
Power circulation and its combined cycle.
Preferably, the exhaust equipment in the combustion powered subsystem selects air exhauster or free convection pipeline.
Preferably, the throttling set in the throttling expansion subsystem can be expansion turbine or throttle valve.
Preferably, cold energy gradient utilization system described in a kind of cold energy gradient utilization system based on thermo-acoustic technology
It further include the cryogenic pump that can be matched, it is described when the raw material cold energy medium supply pressure for entering the cold energy use system is lower
Cold energy medium, which is introduced into cryogenic pump, to be pressurized, then is delivered in chopped-off head thermoacoustic engine into processing.
Preferably, the chopped-off head thermoacoustic engine, secondary thermoacoustic engine and subsequent thermoacoustic engines at different levels and throttling fill
It sets and is sequentially connected；Cold energy medium described in a kind of cold energy gradient utilization system based on thermo-acoustic technology leaves chopped-off head thermoacoustic
Secondary and subsequent thermoacoustic engines and throttling set at different levels are sequentially entered after engine, up to its pressure reduction to discharge standard.
Preferably, the final stage throttling set connection in a kind of cold energy gradient utilization system based on thermo-acoustic technology
Combustion powered subsystem or end cold energy recycle subsystem；The cold energy medium for leaving final stage throttling set exports score by system
Match, is delivered to combustion powered subsystem and end cold energy recycling subsystem respectively.
Preferably, thermoacoustic power generation sub-system connection combustion in a kind of cold energy gradient utilization system based on thermo-acoustic technology
Burning power sub-system outlet steam exhaust device, perhaps industrial waste heat heat power supply device or geothermal energy, water, air room temperature heat source provide dress
It sets；The thermoacoustic power generation sub-system, can also using the industrial waste heat of the outlet steam exhaust of combustion powered subsystem or other forms as heat source
Using water and air as room temperature heat source.
Preferably, end cold energy described in a kind of cold energy gradient utilization system based on thermo-acoustic technology recycles subsystem
System connection low-temperature crushing device or liquefied carbon dioxide preparation facilities or cryopreservation device；End cold energy recycling
The recycled cooling capacity of system is for low-temperature grinding, liquefied carbon dioxide preparation and cryopreservation etc..
According to the above technical scheme, the beneficial effects of the present invention are: proposing a kind of cold energy step benefit based on thermo-acoustic technology
The efficient of cold energy is realized in conjunction with other power cycles and cold energy recovery method using thermoacoustic engine as core energy converter with system
Cascade utilization.Its system is safe and reliable, high conversion efficiency, and variable working condition adaptability is good and compact-sized, initial cost and maintenance cost
It is lower.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is a kind of cold energy gradient utilization system schematic diagram based on thermo-acoustic technology of the present invention.
Fig. 2 is a kind of cold energy gradient utilization system specific embodiment schematic diagram based on thermo-acoustic technology of the present invention.
Fig. 3 is a kind of each state point tephigram of cold energy gradient utilization system natural gas based on thermo-acoustic technology of the present invention.
Logistics is illustrated as follows:
Circulating water passage:
Natural gas runner: →
Air flow channel: →
Label declaration: 1, chopped-off head thermoacoustic engine；2, secondary thermoacoustic engine；3, final stage thermoacoustic engine；4, straight line is sent out
Motor group；5, chopped-off head throttling set；6, secondary nuclear one-stage throttling device；7, combustion-powered apparatus；8, air exhauster；9, indoor temperature end medium changes
Hot device；10, indoor temperature end medium circulation pump；11, chopped-off head cold energy recycles heat exchanger；12, secondary end cold energy recycles heat exchanger；13,
Low-temperature liquid storage tank；14, cryogenic pump 15, air-breathing cooler；16, compressor；17, combustion chamber；18, combustion gas turbine.
Specific embodiment
The present invention will be further described in detail below with reference to the embodiments, following embodiment be explanation of the invention and
The invention is not limited to following embodiments.
Embodiment 1:
As shown in Fig. 1, cascade utilization is carried out to cold energy of liquefied natural gas in the present embodiment, and inputs gas distributing system；
In the present embodiment, thermoacoustic power generation sub-system is by chopped-off head thermoacoustic engine -1, secondary thermoacoustic engine -2, final stage thermoacoustic
Engine -3 and the straight-line electric unit -4 being attached thereto respectively are constituted.
In the present embodiment, throttling expansion subsystem using expansion turbine as throttling set, including chopped-off head expansion turbine -5 and time
Grade expansion turbine -6.
In the present embodiment, combustion-powered apparatus is gas turbine cycle, including air-breathing cooler-in combustion powered subsystem
15, compressor -16, combustion chamber -17 and combustion gas turbine -18.
In the present embodiment, chopped-off head cold energy recycles heat exchanger -11 and is applied to low-temperature grinding, the recycling heat exchange of secondary end cold energy
Device -12 is applied to cryopreservation.
In the present embodiment, low-temperature liquid storage tank initial temperature 130K, pressure store 0.4MPa, the liquefaction being stored in storage tank
Natural gas is pressurized to 3.5MPa and is delivered to chopped-off head thermoacoustic engine -1 by cryogenic pump -14, changes in cold end phase-change heat-exchanger
Thermal evaporation is to saturated natural gas steam and is transported to secondary thermoacoustic engine -2.The cool end heat exchanger of secondary thermoacoustic engine -2 goes out
Mouthful it is connected with chopped-off head expansion turbine -5, pressure reduction is reduced to 1.9MPa, temperature superheated steam after expansion work in turbine
170K subsequently enters final stage thermoacoustic engine -3 and further exchanges heat.The energy conversion efficiency of thermoacoustic engine and its cool and heat ends temperature
Difference is positively correlated, it is secondary, expansion turbine -6 be set between final stage advantageously reduce the cold junction temperature of final stage thermoacoustic engine -3, improve
Transformation efficiency.- 3 exit superheated steam of end thermoacoustic engine be again introduced into secondary expansion turbine -6 acting, steam pressure into
One step is reduced to 1MPa.
The natural gas exported from secondary expansion turbine -6 still has the low temperature of about 170K, and wherein most natural gas is first
Enter low-temperature grinding room and low-temperature cold store afterwards to exchange heat, respectively to the cold of middle-temperature section 170-220K and end 220-293K warm area
Enter gas distributing system after can be carried out recycling and is delivered to user terminal.Pipe network inlet LNG temperature is 293K, conveying
Pressure 1MPa.The natural gas exported from expansion turbine -6 is being inhaled first there are also the gas turbine subsystem that part enters branch
It is exchanged heat in Gas Cooler -15 to reduce gas turbine suction temperature, improves cycle efficieny, subsequently enter in combustion chamber -17 and burn
Discharge chemical energy.
High temperature steam exhaust from gas turbine sequentially enters the heater of three-level thermoacoustic engine as heat source, in regenerator
Temperature gradient generation sound function is established at both ends, and is drawn in the form of pressure oscillation from thermoacoustic engine branch, eventually by straight line
Motor group is converted into electric work output.In practical application, the heat sources such as the seawater of heat exchange are carried out with circulating water loop and are often accompanied by
Seasonal temperature change, but compared with other power cycles, the thermoacoustic engine change for indoor temperature end temperature at work
Changing has stronger adaptability, and performance will not be a greater impact.
Calculation of thermodynamics is carried out to the embodiment below, each subsystem compressor and turbine isentropic efficiency take 0.8, machinery
Efficiency 0.9.Except in liquid nitrogen supply subsystem, -14 power consumption of cryogenic pump is higher outer, other subcycle blower power consumptions are disregarded.
Be defined to each state point: low-temperature liquid storage tank -13 (a), (b) cryogenic pump -14 exports, and (c) chopped-off head thermoacoustic is started
The outlet of -1 cold end phase-change heat-exchanger of machine, secondary -2 cool end heat exchanger of the thermoacoustic engine outlet (d), (e) chopped-off head expansion turbine -5 goes out
Mouthful, (f) -3 cool end heat exchanger of final stage thermoacoustic engine exports, and (g) secondary expansion turbine -6 exports, (h) middle-temperature section cold energy use
Heat exchanger -11 exports, (i) natural gas tube web portal.
Maximum available energy W corresponding to each state point in systemmax=(h-T0s)-(h-T0s)i, cold energy benefit in the system
It can be as shown in the table with energy change procedure with the corresponding liquefied natural gas of process.
Each principal states point liquefied natural gas physical property table of system
Modeling Calculation is carried out to three thermoacoustic engines to work under different temperatures section in DeltaEc software, as a result
As shown in the table, thermoacoustic engine output work sound function corresponding to unit liquefied natural gas gasifying amount amounts in system
1001.69kJ cooling capacity consumes total 618.33kJ.
Thermoacoustic engine primary operating parameter
Output is than r's is defined as: the natural gas into gas distributing system accounts for the ratio between total amount of vaporization of system natural gas, takes r=
0.95.Often there is 1kg natural gas to be vaporized, exports 0.95kg natural gas to pipe network, rest part, which enters to burn in combustion chamber, to be supplied
Energy.Combustion of natural gas calorific value is 47.7MJ/kg, corresponding gas turbine cycle inspiratory capacity 6kg, in combustion powered subsystem and system
Other component energy consumption see the table below with output work.
The energy consumption and output work of each main component in system
It can be calculated, should be based in the cold energy gradient utilization system of thermo-acoustic technology, unit liquefied natural gas gasifying amount is corresponding
Net output work about 1700kJ/kg, practical natural gas output quantity are 0.95kg.
In addition, it should be noted that, the specific embodiments described in this specification, the shape of parts and components are named
Title etc. can be different.The equivalent or simple change that all structure, feature and principles described according to the invention patent design are done, is wrapped
It includes in the scope of protection of the patent of the present invention.Those skilled in the art can be to described specific implementation
Example is done various modifications or additions or is substituted in a similar manner, and without departing from structure of the invention or surmounts this
Range as defined in the claims, is within the scope of protection of the invention.
Claims (8)
1. a kind of cold energy gradient utilization system based on thermo-acoustic technology, it is characterised in that: the cold energy gradient utilization system packet
Include low-temperature liquid storage tank, thermoacoustic power generation sub-system, throttling expansion subsystem, combustion powered subsystem, end cold energy recycling subsystem
With indoor temperature end cycle subsystem；
The thermoacoustic power generation sub-system includes: the thermoacoustic engine of at least three-level, chopped-off head, secondary, final stage thermoacoustic engine and straight
Line generating set；
The throttling expansion subsystem include: at least chopped-off head throttling set, secondary nuclear one-stage throttling device two-stage throttling set, chopped-off head,
Secondary nuclear one-stage throttling device；
The combustion powered subsystem includes: combustion powered circulator, exhaust equipment；
The indoor temperature end cycle subsystem includes: indoor temperature end medium circulation pump, indoor temperature end media heat exchanger；
The end cold energy recycling subsystem includes: the end cold energy recycling heat exchanger of at least one level；
The low-temperature liquid storage tank is connected by cryogenic pump with thermoacoustic engines at different levels；
The thermoacoustic engines at different levels are sequentially connected, and are connected with chopped-off head throttling set between secondary, final stage thermoacoustic engine；End
Time nuclear one-stage throttling device is connected between grade thermoacoustic engine and chopped-off head cold energy recycling heat exchanger；Thermoacoustic engines at different levels are connected with directly
Line generating set；Secondary nuclear one-stage throttling device is sequentially connected with combustion-powered apparatus, indoor temperature end media heat exchanger, indoor temperature end medium circulation
Pump is connected in the both ends of indoor temperature end media heat exchanger, and is connected with combustion chamber and then connect thermoacoustic engines at different levels；
It is connected with chopped-off head cold energy recycling heat exchanger, secondary end between the secondary nuclear one-stage throttling device and combustion-powered apparatus in turn
Cold energy recycles heat exchanger.
2. the cold energy gradient utilization system according to claim 1 based on thermo-acoustic technology, it is characterised in that: the thermoacoustic
Thermoacoustic engine at different levels is that standing wave, traveling wave or Standing-Traveling Wave mixed type thermoacoustic engine, the thermoacoustic are started in power generation sub-system
Machine is single-stage or multistage loop type thermoacoustic engine.
3. the cold energy gradient utilization system according to claim 1 based on thermo-acoustic technology, it is characterised in that: the burning
Combustion powered circulator in power sub-system is gas turbine cycle, Steam Power Circulation and its combined cycle.
4. the cold energy gradient utilization system according to claim 1 based on thermo-acoustic technology, it is characterised in that: the burning
Exhaust equipment in power sub-system selects air exhauster or free convection pipeline.
5. the cold energy gradient utilization system according to claim 1 based on thermo-acoustic technology, it is characterised in that: the throttling
Expanding throttling set in subsystem can be expansion turbine or throttle valve.
6. the cold energy gradient utilization system according to claim 1 based on thermo-acoustic technology, it is characterised in that: the cold energy ladder
Grade further includes the cryogenic pump that can be matched using system, and the cryogenic pump is connected with chopped-off head thermoacoustic engine.
7. a kind of cold energy gradient utilization system based on thermo-acoustic technology according to claim 1, it is characterised in that: the heat
Sound power generation sub-system connect combustion powered subsystem outlet steam exhaust device perhaps industrial waste heat heat power supply device or geothermal energy, water,
Air room temperature heat source provides device.
8. a kind of cold energy gradient utilization system based on thermo-acoustic technology according to claim 1, which is characterized in that the end
Hold cold energy recycling subsystem connection low-temperature crushing device or liquefied carbon dioxide preparation facilities or cryopreservation device.
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